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| Home > Publications database > Elastische K$^{+}$-Kern-Streuung mit einer mikroskopischen K$^{+}$-Nukleon t-Matrix |
| Book/Report | FZJ-2020-02075 |
1988
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/24917
Report No.: Juel-Spez-0486
Abstract: The elastic scattering of K$^{+}$-mesons from nuclei is studied to access the possibility of a hadronic scale change in nuclear matter. The K$^{+}$ - meson is the appropriate probe for such studies because of its large mean free path of $\sim$7fm in nuclei. The total and the elastic differential cross sections are calculated for the reactions K$^{+}$-deuteron, K$^{+}$ - $^{12}$C and K$^{+}$- 40Ca at various incident energies (4.50MeV /c $\le$p$_{lab}$ $\le$800MeV /c) using an optical potential which was constructed in lowest order multiple scattering theory (t$_{\rho}$-factorisation in monumentum space). The density $\rho$ was taken from electron-scattering experiments corrected for the finit size of the proton. The (K$^{+}$ -N) t-matrix was constructed from a microscopic model based on meson exchange and developed by Büttgen and Holinde. The off-shell behavior of the microscopic K$^{+}$-N t-matrix is examined. Using this microscopic K$^{+}$ -N t-matrix in the construction of the K$^{+}$ -nucleus optical potential we get an excellent description of total and elastic differential cross sections for deuteron, $^{12}$C and $^{40}$Ca. We also obtain a good description of the measured ratio $\frac{\sigma_{total}^{K{^{+}-12_{e}}}}{\sigma_{total}^{K^{+}-deuteron}}$ over a wide incident energy range. The reason for this good aggreement is due to a different interference phase of the scattering phase shifts using experimental phase shifts or phase shifts calculated from microscopic meson exchange rnodel.
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